import json
def read_data(path):
    with open(path,mode='r',encoding='utf-8') as f:
        data=json.load(f)
        return data

def write_data(data_list, path):
    with open(path,mode='w',encoding='utf-8') as f:
        json.dump(data_list,f,ensure_ascii=False)

if __name__ == '__main__':
    #测试读数据
    path= r'user.json'
    print(read_data(path))
    #测试写成JSON数据
    user_list=[{"username": "zhangsan", "password": "123"}, {"username": "lisi", "password": "123"},
                 {"username": "wangwu", "password": "123"}]
    write_data(user_list, path)